COMPARISON OF COMPUTATION METHODS FOR DRAG FORCE OF PERMIABLE LAYER IN A NUMERICAL WAVE FLUME

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  • 数値波動水路における透水層の抵抗力算定法の比較

Abstract

 This study deals with the computation methods for drag force of permeable layer in the numerical wave flume CADMAS-SURF. Two models using the drag coefficient and Dupuit-Forchheimer law are available to compute the drag force in CADMAS-SURF. The reflection coefficient and overtopping quantity are taken as the evaluation indices, and the numerical computations and laboratory experiments are conducted using regular waves and a conventional revetment that consists of rubble or wave-dissipating blocks to investigate the applicability of the models. It is shown that the numerical results obtained from the model using Dupuit-Forchheimer law agree reasonably well with the experimental data.

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